Caad Meets Digital Photogrammetry - Modelling "Weak Forms" For Computer Measurement

The integration of state-of-the-art photogrammetric methods with the capabilities of CAAD has great potential for a variety of architectural applications. This paper describes the current status of an ongoing research project which aims to develop an easy to use tool for the photogrammetric generation of accurate, reliable and well structured 3D CAAD models of architectural objects. The project adresses the whole range of issues that arise from the digital image acquisition to the data processing, the data integration between photogrammetry and CAAD and the architectural structuring of the geometric data. While also giving a brief overview of the project, the paper concentrates on one central aspect of the system: a method to model what we will define as "weak forms" as the basis for qualitatively controlled computer measurement. 1. INTRODUCTION Nowadays surveying methods based on imaging sensors are used in many applications in computer vision, robotics, machine vision and..